Medium severity · published Dec 5, 2025
CVE-2025-65082
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly…
6.5
CVSS
0.8%
EPSS
No
On KEV
Description
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.
This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.
Users are recommended to upgrade to version 2.4.66 which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.0 before 2.4.66 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-65082
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-65082
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_24.html
Issue Tracking
http://www.openwall.com/lists/oss-security/2025/12/04/7
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